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Tools2026-09-16 · source-backed
The September 15 release ships @mastra/connect, converting platform integration connections into agent tools executed through a connection proxy that injects credentials and refreshes tokens, with live tool discovery and optional allowlisting. It also enables a Studio Workflow Builder backend via a workflowBuilder editor option, and adds per-call background dispositions to tools. Two breaking changes: subscribeQueuedMessages becomes subscribeThreadEvents, ArchilFilesystem.grep() becomes diskGrep().
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@mastra/memory gains async beforeObservation, afterObservation, beforeReflection and afterReflection hooks so an app can redact or reshape messages before model calls or persistence, which is the piece anyone with PII in agent memory has been missing. Core adds idempotent batc...
Bounded time ranges, recursive trace/span/score predicates, thread grouping and deterministic cursor pagination, validated and rejected before any storage adapter runs, with implementations in ClickHouse, DuckDB and Postgres. Tenant-scoped trace deletion handles up to 1,000 tr...
The TypeScript framework added a v1 ToolProvider runtime for managing OAuth-backed connections, @mastra/mysql as a first-class storage backend, and a VercelMicroVMSandbox built on ephemeral Firecracker microVMs (GitHub). The MicroVM sandbox is the standout. Per-session isolate...
BakeLens/crust (355 stars) — Go-based transparent gateway that intercepts agent tool calls and blocks dangerous actions via hot-reloadable YAML rules. Fills the critical gap between static code scanning and full VM isolation. Define rules like "block all file writes outside /t...
Released September 4. @mastra/evals/vitest exposes runEvals as Vitest tests with expectEvals/expectEval and a per-test score reporter, so agent quality checks run in the same pipeline as unit tests. It also adds reusable sandbox template APIs so a workspace-backed coding agent...
If you wrote an MCP server before July, it's on a protocol shape the maintainers have already removed. Not deprecated-with-a-migration-window. Removed from the spec. MCP lead maintainers David Soria Parra and Den Delimarsky published an updated roadmap on August 22, and the re...
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